[URL="http://api.tweetmeme.com/share?url=http://espn.go.com/nfl/trainingcamp12/story/_/id/8260052/source-carolina-panthers-give-jonathan-stewart-5-years-365-million-deal&service=bit.ly&source=espn"][IMG]http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/nfl/trainingcamp12/story/_/id/8260052/source-carolina-panthers-give-jonathan-stewart-5-years-365-million-deal[/IMG][/URL]The Carolina Panthers have signed running back Jonathan Stewart to a five-year contract extension, the team announced Saturday.